The A6111 ran across the north of Northumberland from the A697 at Wooler to the A1 a couple of miles south of Berwick-upon-Tweed. It was originally the B6350, but was upgraded to Class I by the end of the 1920s. However, it has since been downgraded again to the B6525.
The road started on the A697 on the northern side of Wooler and headed northwards, following the Wooler Water to the River Till, which it crossed. It passed below Doddington Moor to go through the village of Doddington before climbing onto Doddington North Moor.
The road continued along the top to reach the B6353. It multiplexed with it around a sharp right-hand bend then bore left as the other road continued ahead into Lowick. The A6111 continued north, descending gently. After zigzagging through the tiny village of Ancroft the road continued on - with the last mile or so being dead straight - to end on the A1 just south of Scremerston.